18 Questions
What is the purpose of a tachometer generator in the compressor speed indicating system?
To show the actual RPM or a percentage of the maximum engine speed
Where is the tachometer generator usually mounted in relation to the engine?
On the engine accessory gearbox
What does the oil temperature indicator help determine about the aircraft?
Performance of the oil cooling system
How is oil pressure indicated in most systems?
Using a pressure transmitter connected to an indicator
What units of measurement is the oil temperature indicator typically calibrated in?
Degrees Celsius
If an aircraft's cockpit indicator displays %RPM, what is being shown?
A percentage of the maximum engine speed
What is the main purpose of engine cockpit indicators?
To monitor engine output or performance.
Which two main performance instruments are used to monitor engine output?
Engine Pressure Ratio (EPR) and torque.
What is the EPR formula used to calculate in the context of engine pressure ratio systems?
(Pt7 / Pt2)
Which company uses station Pt2 and station Pt7 to identify EPR tap-off points in their engines?
Pratt & Whitney
In a typical EPR system, what component generates a signal to the cockpit EPR indicator?
Pressure transmitter
Which type of pressure is sensed and interpreted by a pressure transmitter in a typical EPR system?
Compressor inlet and turbine discharge pressures
What is the purpose of gas temperature indicators in an aircraft engine?
To monitor gas temperature during engine start-up or take-off
How does a multi-probe system ensure accurate temperature sensing in an aircraft engine?
By averaging the signal from different temperature probes at a terminal block
What is the function of a fuel flow transmitter in an aircraft system?
To measure the amount of fuel being used by the engine
Why are multiple temperature probes used in an engine gas temperature indicating system?
To provide accurate temperature sensing and reduce error possibilities
Which component is crucial for monitoring engine performance during various flight phases?
Gasflow temperature indicators
In an aircraft engine, what is the role of thermocouples in the temperature indicating system?
To average temperature signals before transmission to the indicator
Test your knowledge on the compressor speed indicating system, which consists of a tachometer generator linked to a cockpit indicator. Learn about how engine speed is transmitted, the role of the tacho generator, and how cockpit indicators display RPM information.
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